Because they think that Bitcoin can replace them and they will lose money, people's trust and of course the control. Banks shouldn't be afraid of Cryptos and Blockchain. Technology is growing so fast and banks shouldn't close the door to it. One day they will understand their mistakes and they will learn from them.

There are 2 options:
1) RPC call to the daemon to generate new address (the wallet addresses are pre-generated in key pool) and each user_id own some addresses (see open source crypto-trading platforms source code in PHP).
2) (Not recommended) Each user has an unique ID and new addresses are generated via seed, so they are actually pre-generated and easy to recover if you now the seed. Then it goes like that:
[seed]-> [Purpose][Coin][Account][External / Internal][address id]

m/44'/0'/111'/0/1  -> Bitcoin address, user_id 112, second address
m/44'/145'/48271'/0/3  -> Bitcoin Cash address, user_id 48271, fourth address
m/49'/0'/54'/0/0  -> Bitcoin SegWit address, user_id 55, first address

Stop using this computer because it overwrites all the data to the HDD again and send it for a recovery to the professionals. They may help you. But don't tell them about bitcoins. It's better not to know because they can take them if wallet is not protected with a password.

My friend it depends the volume you trade. If you are trading with $5k and you lose $2k then there is a huge problem because you are -40%. You will need about +66%.
If you are trading with $50k and you lose $2k then it's ok. It means that you lost ~4%. It's easy to recover your lost with a good trade, like EOS right now which is going to reach 18-24 Billions USD market cap before it goes live in my opinion.

Important:
You should never trade/invest more than you can afford or are willing to lose.

Haven't tried the bitcoin-core-gui but I am sure that you can configure it to use TOR Socks5 proxy. Use 127.0.0.1:9050 and check torrc file in "Browser/TorBrowser/Data/Tor.
I think that you should remove all lines that contain ReachableAddresses and then restart tor. That's all I found on the internet right now. Test it and post your results.

Is the contract deployed in the Ethereum blockchain? If yes then you can't distribute the ERC20 Tokens with the method I told you. You need to add this code in the smart-contract.

Nice! Keep developing it. You can also get some code ideas from WLOX (https://github.com/wlox/wlox) which is PHP coded too.

Hi. I think that this is what you need. Check this code here: https://github.com/omisego/airdrop/blob/master/contracts/Airdropper.sol

UPDATE: No, you can't do it with Ethereum. Only if it is built-in in a smart-contract.

I can't understand why you want to join those pump&dump groups. Most of the users lose money there because most of the coins are pre-pumped. Anyway, you know.

Allow me to say that all of this kind of "bugs" and "exploits" will not cause any problem to a normal user. You are SAFE! Nobody will modify the hardware wallet if you buy it from the official store(Trezor, ledger etc.).

No program can have access to the hardware wallet seed or private keys. To sign a transaction you need to press a button so every time you want to make a transaction you need to double check the outputs.

All other threads like man-in-the-middle attack are just theory.

I don't think that this is true. Bitcoin and other cryptos are mainly used by investors due to the high daily price change, the easy of using them and from those who want to hide their funds or make international payments. I believe that less than 0.1% of transactions belong to criminal activity. Don't forget that criminals don't care about currencies. You think that a criminal can't use USD or other currency to make a transaction? Except if you mean as a criminal someone that wants to hide his money from tax authorities.

Exactly. You can't send a transaction to multiple accounts/addresses because Ethereum doesn't work with UTXO method but with account method. So you spend Ethers from one account to other one. Not transactions that you have received (inputs) to other addresses (outputs).

You mean something like an airdrop? If yes check this code here: https://github.com/omisego/airdrop/blob/master/contracts/Airdropper.sol

You cant create an "exchange like binance" with download a script. Lol. It's not that easy. You need budget, you need license, you need security experts to check for vulnerabilities in the system, you need to hire coders and developers, you need expensive server systems to host coins daemons like bitcoind and many more. Even if you manage to find a good open-source code and fix most of the bugs and add translations, after a long time you will be bored doing that.
Think that an exchange platform is a business with millions of daily trading volume. You can't just risk user funds on random scripts you found on the internet.

I believe that paying more than 20 cents for a crypto-transaction with 1 input and 2 outputs is too expensive for me. If Bitcoin had full segwit adoption and dynamic block size for increasing block size when there is a high usage period, there would be no need for other altcoins usage and the price would be much higher.

Why you think that a coin like Ethereum will worth $30 in the future? That what I know is the Ether price will be much higher than it is right now in the future, when the max supply will be limited.

That's right and I think it's really important. There are people that feel bad when they are losing money and there are people who feel bad too when they don't earn money (but not losing).
You should not say to yourself "Oh, I should had invest in that coin". Relax. You didn't lose money. You just didn't earned them! There will be other coin in the future and you will be more lucky.

Have patience and never sell lower than you bought except if you are trading BTC/altcoin and you need BTC for a trade that you are sure that will give you profit.
Also, you don't have to think for hours if you should buy or sell when you are sure about something. It will just make you nervous. Most of the times that a patient and good trader lose money are after a strong crash which is normal.
You should know that you can't always win and you should never trade/invest more than you can afford or are willing to lose.

I think that it's better to leave Tethers in the exchange platform wallet. Tether has also very high transaction fees due to Omni Layer. That what you need to know is that both Tether and exchange platform wallet belongs to a company and it's centralized.
Most of traders use USDT only to avoid losing money when market crash.

Before you start trading with huge volumes, you need to have some basic trading knowledge. Most of the new guys in trading are losing money because they have no patience and they panic sell when price goes down and then buying higher.